# Error: No matching repo to modify: crb {Oracle Linux 9 / Rocky Linux 9}

**URL:** <https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401>\
**Category:** Rocky Linux Help & Support\
**Created:** [December 30, 2022, 11:28am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401 "2022-12-30T11:28:37Z")\
**Posts on this page:** 17\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jil](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/jil/32/1089_2.png) [@Jil](https://forums.rockylinux.org/u/Jil)\
**Post date:** [December 30, 2022, 11:28am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/1 "2022-12-30T11:28:37Z")

</div>

Hello Team,

I have this challenge whenever I try to install the CRB repo on Oracle Linux 9 / Rocky Linux 9

My repolist looks like this:-

**# dnf repolist**  
repo id repo name  
ol9\_UEKR7 Oracle Linux 9 UEK Release 7 (x86\_64)  
ol9\_appstream Oracle Linux 9 Application Stream Packages (x86\_64)  
ol9\_baseos\_latest Oracle Linux 9 BaseOS Latest (x86\_64)  
ol9\_developer\_EPEL Oracle Linux 9 EPEL Packages for Development (x86\_64)

I have installed the latest EPEL.  
**# dnf list installed | grep epel**  
oracle-epel-release-el9.x86\_64 1.0-1.el9 @ol9\_baseos\_latest

Still, I have set my crypto-policies to DEFAULT

But every time I run the CRB command:  
**# dnf config-manager --enable crb**  
Error: No matching repo to modify: crb.

I get this error. This is the same case with my Rocky Linux 9 lab-machine.

Am trying to install **KDE Desktop Environment on Oracle Linux 9** , but this issue cant allow me to continue.

Please help.

---

<div class="post-metadata">

**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\
**Post date:** [December 30, 2022, 12:43pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/2 "2022-12-30T12:43:47Z")

</div>

Oracle Linux most likely has a different name for crb. You can check that by doing:

```auto
dnf repolist --all

```

and then see what is shown. For example on Oracle 8 it was called `ol8_codeready_builder`.

The command will work for Rocky 9 though, as I have used it:

```auto
[root@rocky9 ~]# dnf config-manager --enable crb
[root@rocky9 ~]# dnf repolist
repo id repo name
appstream Rocky Linux 9 - AppStream
baseos Rocky Linux 9 - BaseOS
crb Rocky Linux 9 - CRB
elrepo ELRepo.org Community Enterprise Linux Repository - el9
epel Extra Packages for Enterprise Linux 9 - x86_64
extras Rocky Linux 9 - Extras

```

as you can see it’s clearly there. On Rocky 9 you can also do:

```auto
crb enable

```

or check it with:

```auto
crb status

```

that package comes from EPEL so make sure to do:

```auto
dnf install epel-release

```

And just in case you have some repo file corruption, the crb entries should be in `/etc/yum.repos.d/rocky.repo` and you should be able to see crb entries like below:

```auto
[crb]
name=Rocky Linux $releasever - CRB
mirrorlist=https://mirrors.rockylinux.org/mirrorlist?arch=$basearch&repo=CRB-$releasever$rltype
#baseurl=http://dl.rockylinux.org/$contentdir/$releasever/CRB/$basearch/os/
gpgcheck=1
enabled=1
countme=1
metadata_expire=6h
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-9

[crb-debug]
name=Rocky Linux $releasever - CRB - Debug
mirrorlist=https://mirrors.rockylinux.org/mirrorlist?arch=$basearch&repo=CRB-$releasever-debug$rltype
#baseurl=http://dl.rockylinux.org/$contentdir/$releasever/CRB/$basearch/debug/tree/
gpgcheck=1
enabled=0
metadata_expire=6h
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-9

[crb-source]
name=Rocky Linux $releasever - CRB - Source
mirrorlist=https://mirrors.rockylinux.org/mirrorlist?arch=source&repo=CRB-$releasever-source$rltype
#baseurl=http://dl.rockylinux.org/$contentdir/$releasever/CRB/source/tree/
gpgcheck=1
enabled=0
metadata_expire=6h
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-9

```

if you are missing these in that rocky.repo file, then that would explain why, so you can copy and paste the above into your `/etc/yum.repos.d/rocky.repo` file to ensure that they exist and can be enabled/disabled. If they are missing, that would suggest your install method or ISO is corrupted as they are there by default normally.

You should verify that though using the `dnf repolist --all` command to see what repositories the system sees, enabled or disabled. But for Oracle, it will most likely have a different name, and not crb.

---

<div class="post-metadata">

**Author:** ![Jil](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/jil/32/1089_2.png) [@Jil](https://forums.rockylinux.org/u/Jil)\
**Post date:** [December 30, 2022, 1:16pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/3 "2022-12-30T13:16:02Z")

</div>

@iwalker  
Thank you so much, Ian. Let me try it out and then update .

```auto
**# dnf repolist --all**
repo id repo name status
ol9_MODRHCK Latest RHCK with fixes from Oracle for Oracle Linux 9 (x86_64) disabled
ol9_RDMA Oracle Linux 9 (x86_64) RDMA disabled
ol9_UEKR7 Oracle Linux 9 UEK Release 7 (x86_64) enabled
ol9_addons Oracle Linux 9 Addons (x86_64) disabled
ol9_appstream Oracle Linux 9 Application Stream Packages (x86_64) enabled 
ol9_baseos_latest Oracle Linux 9 BaseOS Latest (x86_64) enabled 
**ol9_codeready_builder Oracle Linux 9 CodeReady Builder (x86_64) - (Unsupported) disabled**
ol9_developer_EPEL Oracle Linux 9 EPEL Packages for Development (x86_64) enabled 
ol9_distro_builder Oracle Linux 9 Distro Builder (x86_64) - (Unsupported) disabledol9_kvm_utils Oracle Linux 9 KVM Utilities (x86_64) disabledol9_u0_baseos_base Oracle Linux 9 BaseOS GA (x86_64) disabledol9_u1_baseos_base Oracle Linux 9.1 BaseOS (x86_64)  

```

Thats the output of the dnf repolist.

Enabling the ol9\_codeready\_builder.

```auto
**# dnf config-manager --enable ol9_codeready_builder**

```

The /etc/yum.repos.d/oracle-linux-ol9.repo looks like this.

```auto
# cat /etc/yum.repos.d/oracle-linux-ol9.repo 
[ol9_baseos_latest]
name=Oracle Linux 9 BaseOS Latest ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/baseos/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

[ol9_appstream]
name=Oracle Linux 9 Application Stream Packages ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/appstream/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

[ol9_u0_baseos_base]
name=Oracle Linux 9 BaseOS GA ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/0/baseos/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol9_u1_baseos_base]
name=Oracle Linux 9.1 BaseOS ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/1/baseos/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol9_addons]
name=Oracle Linux 9 Addons ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/addons/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol9_codeready_builder]
name=Oracle Linux 9 CodeReady Builder ($basearch) - (Unsupported)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/codeready/builder/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

[ol9_distro_builder]
name=Oracle Linux 9 Distro Builder ($basearch) - (Unsupported)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/distro/builder/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol9_MODRHCK]
name=Latest RHCK with fixes from Oracle for Oracle Linux $releasever ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL9/MODRHCK/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
priority=20
enabled=0

```

Running the “KDE Plasma Workspaces” command gives this output.

```auto
**# dnf groupinstall -y "KDE Plasma Workspaces"**
Last metadata expiration check: 0:01:25 ago on Fri 30 Dec 2022 03:55:25 PM EAT.
Module or Group 'KDE Plasma Workspaces' is not available.
Error: Nothing to do.

```

Does this mean that its impossible to install KDE Plasma Desktop Environment on Oracle Linux 9?

---

<div class="post-metadata">

**Author:** ![jlehtone](https://avatars.discourse-cdn.com/v4/letter/j/e9a140/32.png) [@jlehtone](https://forums.rockylinux.org/u/jlehtone)\
**Post date:** [December 30, 2022, 1:27pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/4 "2022-12-30T13:27:17Z")

</div>

Oracle? Does OL have its own community / documentation?

---

<div class="post-metadata">

**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\
**Post date:** [December 30, 2022, 1:32pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/5 "2022-12-30T13:32:59Z")

</div>

@Jil I’ve formatted your posts to make them more readable, please use the tools to format correctly, so it saves me having to do it 🙂

But yeah, if you don’t have EPEL or whatever repo that provides “KDE Plasma Workspaces”, then no you cannot install it. I don’t know what provides that group but I assume EPEL. So maybe you didn’t install `epel-release`. I have crb and epel installed and I see it. Since EPEL relies on packages from CRB, then you should have both enabled. One, or the other, is not enough.

Most commands that work on Rocky will translate to Oracle Linux, maybe with different repo names at least as you found with CRB vs codereadybuilder (which crb is short for). Anything deeper with Oracle Linux, we cannot really help with since this is a Rocky forum, so the Oracle stuff should be asked in the Oracle community. Otherwise, pretty much everything should work between the two without problems other than name changes for certain things.

---

<div class="post-metadata">

**Author:** ![jlehtone](https://avatars.discourse-cdn.com/v4/letter/j/e9a140/32.png) [@jlehtone](https://forums.rockylinux.org/u/jlehtone)\
**Post date:** [December 30, 2022, 3:03pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/6 "2022-12-30T15:03:26Z")

</div>

> [@iwalker](#):
>
> EPEL or whatever repo that provides “KDE Plasma Workspaces”

The “yum groups” are defined within repository metadata. All about KDE is in EPEL, so one does need to define&enable EPEL repository before its metadata is usable.

> [@iwalker](#):
>
> maybe you didn’t install `epel-release`.

Rocky “extras” and Alma “extras” repos do provide `epel-release` for convenience.  
I bet that RHEL does not and I have no idea what Oracle does.

The repoid that contains “EPEL” is probably not “the EPEL”:

```auto
ol9_developer_EPEL Oracle Linux 9 EPEL Packages for Development (x86_64)

```

(It isn’t defined in `/etc/yum.repos.d/oracle-linux-ol9.repo` as far as I can see.)

---

<div class="post-metadata">

**Author:** ![label](https://avatars.discourse-cdn.com/v4/letter/l/c5a1d2/32.png) [@label](https://forums.rockylinux.org/u/label)\
**Post date:** [December 30, 2022, 5:06pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/7 "2022-12-30T17:06:38Z")

</div>

Oracle provides their own “epel” where they likely pick and choose what they want from actual epel.

---

<div class="post-metadata">

**Author:** ![Jil](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/jil/32/1089_2.png) [@Jil](https://forums.rockylinux.org/u/Jil)\
**Post date:** [December 30, 2022, 5:22pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/8 "2022-12-30T17:22:02Z")

</div>

Thank you alot guys.

---

<div class="post-metadata">

**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\
**Post date:** [December 30, 2022, 6:37pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/9 "2022-12-30T18:37:52Z")

</div>

> [@jlehtone](#):
>
> Rocky “extras” and Alma “extras” repos do provide `epel-release` for convenience.

Yep, for RHEL, Oracle and others that don’t have it, easy just to follow instructions from the EPEL webpage on how to get it installed and running. TBH I think if I was using Oracle, I’d prefer the main EPEL one, than the one Oracle provides, especially if it’s a pick and choose of what they feel should be accessible.

---

<div class="post-metadata">

**Author:** ![gerry666uk](https://avatars.discourse-cdn.com/v4/letter/g/dbc845/32.png) [@gerry666uk](https://forums.rockylinux.org/u/gerry666uk)\
**Post date:** [December 30, 2022, 6:46pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/10 "2022-12-30T18:46:52Z")

</div>

> [@jlehtone](#):
>
> I bet that RHEL does not

I think it does provide the ability to enable it out-of-the-box, but it then says everything within it is not supported.

---

<div class="post-metadata">

**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\
**Post date:** [December 30, 2022, 7:54pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/11 "2022-12-30T19:54:03Z")

</div>

> [@gerry666uk](#):
>
> I think it does provide the ability to enable it out-of-the-box, but it then says everything within it is not supported.

No, RHEL doesn’t provide EPEL to enable out of the box.

```auto
[root@rhel9 ~]# dnf repolist --all | grep -i epel
[root@rhel9 ~]# dnf search epel
Updating Subscription Management repositories.
Last metadata expiration check: 2:30:21 ago on Fri 30 Dec 2022 06:23:03 PM CET.
No matches found.

```

you have to add it using the instructions from EPEL’s page.

See: [https://access.redhat.com/solutions/3358](https://access.redhat.com/solutions/3358) where they explain exactly that in their own docs.

---

<div class="post-metadata">

**Author:** ![Jil](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/jil/32/1089_2.png) [@Jil](https://forums.rockylinux.org/u/Jil)\
**Post date:** [December 31, 2022, 6:04am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/12 "2022-12-31T06:04:04Z")

</div>

I have found out the following.

1. KDE is not available from the official Red Hat RHEL 8 repositories.

```auto
sudo dnf group info "KDE Plasma Workspaces"

Last metadata expiration check: 2:51:16 ago on Sat 31 Dec 2022 05:43:04 AM EAT.
Warning: Group KDE Plasma Workspaces does not exist.

```

1. Analysing the KDE Plasma Workspaces info.

```auto
sudo dnf group info "KDE Plasma Workspaces"
Last metadata expiration check: 2:51:16 ago on Sat 31 Dec 2022 05:43:04 AM EAT.
Warning: Group KDE Plasma Workspaces does not exist.

```

1. Analysing the hidden repositories.

```auto
sudo dnf group list hidden
Last metadata expiration check: 2:51:39 ago on Sat 31 Dec 2022 05:43:04 AM EAT.
Available Environment Groups:
   Server
   Minimal Install
   Workstation
   Custom Operating System
   Virtualization Host
Installed Environment Groups:
   Server with GUI
Installed Groups:
   Hardware Support
   Server product core
   base-x
   Container Management
   Core
   Fonts
   GNOME
   Guest Desktop Agents
   Hardware Monitoring Utilities
   Headless Management
   Internet Browser
   Multimedia
   Common NetworkManager submodules
   KVM platform specific packages
   Printing Client
   Standard
Available Groups:
   Conflicts BaseOS
   Dial-up Networking Support
   Large Systems Performance
   Legacy UNIX Compatibility
   Mainframe Access
   Python Web
   Additional Development
   Anaconda tools
   Backup Client
   Base
   Conflicts AppStream
   Console Internet Tools
   Debugging Tools
   Desktop Debugging and Performance Tools
   Development Tools
   DNS Name Server
   .NET Development
   Emacs
   File and Storage Server
   FTP Server
   GNOME Applications
   Graphical Administration Tools
   Graphics Creation Tools
   Guest Agents
   Infiniband Support
   Input Methods
   Internet Applications
   Java Development
   Java Platform
   Legacy X Window System Compatibility
   Mail Server
   Network File System Client
   Network Servers
   Networking Tools
   Office Suite and Productivity
   Image based rpm-ostree support
   Performance Tools
   Platform Development
   Hyper-v platform specific packages
   VMware platform specific packages
   Remote Desktop Clients
   Remote Management for Linux
   RPM Development Tools
   Scientific Support
   Security Tools
   Smart Card Support
   Windows File Server
   System Tools
   TeX formatting system
   Virtualization Client
   Virtualization Hypervisor
   Virtualization Platform
   Virtualization Tools
   Basic Web Server
   Workstation product core

```

1. Listing KDE baseapps.

```auto
sudo dnf list kde-baseapps
Last metadata expiration check: 2:52:44 ago on Sat 31 Dec 2022 05:43:04 AM EAT.
Error: No matching Packages to list

```

1. But listing all repos with kde\*

```auto
sudo dnf list kde*
Last metadata expiration check: 2:52:57 ago on Sat 31 Dec 2022 05:43:04 AM EAT.
Available Packages
kde-cli-tools.src 5.23.5-1.el9 ol9_developer_EPELkde-cli-tools.x86_64 5.23.5-1.el9 ol9_developer_EPELkde-connect.src 22.04.1-3.el9 ol9_developer_EPELkde-connect.x86_64 22.04.1-3.el9 ol9_developer_EPELkde-connect-libs.x86_64 22.04.1-3.el9 ol9_developer_EPELkde-connect-nautilus.x86_64 22.04.1-3.el9 ol9_developer_EPELkde-dev-scripts.noarch 22.04.1-1.el9 ol9_developer_EPELkde-dev-scripts.src 22.04.1-1.el9 ol9_developer_EPELkde-dev-utils.src 22.04.1-1.el9 ol9_developer_EPELkde-dev-utils.x86_64 22.04.1-1.el9 ol9_developer_EPELkde-dev-utils-common.noarch 22.04.1-1.el9 ol9_developer_EPELkde-filesystem.src 4-67.el9 ol9_developer_EPELkde-filesystem.x86_64 4-67.el9 ol9_developer_EPELkde-gtk-config.src 5.24.6-1.el9 ol9_developer_EPELkde-gtk-config.x86_64 5.24.6-1.el9 ol9_developer_EPELkde-partitionmanager.src 21.12.2-2.el9 ol9_developer_EPELkde-partitionmanager.x86_64 21.12.2-2.el9 ol9_developer_EPELkde-print-manager.src 22.04.1-1.el9 ol9_developer_EPELkde-print-manager.x86_64 22.04.1-1.el9 ol9_developer_EPELkde-print-manager-libs.x86_64 22.04.1-1.el9 ol9_developer_EPELkde-settings.noarch 35.0-2.el9.1 ol9_developer_EPELkde-settings.src 35.0-2.el9.1 ol9_developer_EPELkde-settings-plasma.noarch 35.0-2.el9.1 ol9_developer_EPELkde-settings-pulseaudio.noarch 35.0-2.el9.1 ol9_developer_EPELkdebugsettings.src 22.04.1-1.el9 ol9_developer_EPELkdebugsettings.x86_64 22.04.1-1.el9 ol9_developer_EPELkdeconnectd.x86_64 22.04.1-3.el9 ol9_developer_EPELkdecoration.src 5.24.6-1.el9 ol9_developer_EPELkdecoration.x86_64 5.24.6-1.el9 ol9_developer_EPELkdecoration-devel.x86_64 5.24.6-1.el9 ol9_developer_EPELkdeedu-data.noarch 22.04.1-1.el9 ol9_developer_EPELkdeedu-data.src 22.04.1-1.el9 ol9_developer_EPELkdegraphics-mobipocket.src 22.04.1-1.el9 ol9_developer_EPELkdegraphics-mobipocket.x86_64 22.04.1-1.el9 ol9_developer_EPELkdegraphics-mobipocket-devel.x86_64 22.04.1-1.el9 ol9_developer_EPELkdegraphics-thumbnailers.src 22.04.1-1.el9 ol9_developer_EPELkdegraphics-thumbnailers.x86_64 22.04.1-1.el9 ol9_developer_EPELkdenetwork-filesharing.src 22.04.1-1.el9 ol9_developer_EPELkdenetwork-filesharing.x86_64 22.04.1-1.el9 ol9_developer_EPELkdepim-addons.src 22.04.1-1.el9 ol9_developer_EPELkdepim-addons.x86_64 22.04.1-1.el9 ol9_developer_EPELkdepim-runtime.src 1:22.04.1-1.el9 ol9_developer_EPELkdepim-runtime.x86_64 1:22.04.1-1.el9 ol9_developer_EPELkdepim-runtime-libs.x86_64 1:22.04.1-1.el9 ol9_developer_EPELkdeplasma-addons.src 5.24.6-1.el9 ol9_developer_EPELkdeplasma-addons.x86_64 5.24.6-1.el9 ol9_developer_EPELkdeplasma-addons-devel.x86_64 5.24.6-1.el9 ol9_developer_EPELkdesdk-kioslaves.src 22.04.1-1.el9 ol9_developer_EPELkdesdk-kioslaves.x86_64 22.04.1-1.el9 ol9_developer_EPELkdesdk-thumbnailers.src 22.04.1-1.el9 ol9_developer_EPELkdesdk-thumbnailers.x86_64 22.04.1-1.el9 ol9_developer_EPELkdesu.x86_64 1:5.23.5-1.el9 ol9_developer_EPELkdevelop.src 9:22.04.3-2.el9 ol9_developer_EPELkdevelop.x86_64 9:22.04.3-2.el9 ol9_developer_EPELkdevelop-devel.x86_64 9:22.04.3-2.el9 ol9_developer_EPELkdevelop-libs.x86_64 9:22.04.3-2.el9 ol9_developer_EPELkdevelop-pg-qt.src 2.2.1-6.el9 ol9_developer_EPELkdevelop-pg-qt.x86_64 2.2.1-6.el9 ol9_developer_EPELkdevelop-pg-qt-devel.x86_64 2.2.1-6.el9   

```

1. But KDE Plasma Workspaces is available from the EPEL repositories.

```auto
sudo rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm

Retrieving https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
warning: /var/tmp/rpm-tmp.LqWCKs: Header V4 RSA/SHA256 Signature, key ID 3228467c: NOKEY
Verifying... ################################# [100%]
Preparing... ################################# [100%]
Updating / installing...
   1:epel-release-9-4.el9 ################################# [100%]
Many EPEL packages require the CodeReady Builder (CRB) repository.
It is recommended that you run /usr/bin/crb enable to enable the CRB repository.

```

```auto
sudo dnf upgrade

```

Enabling CRB.

```auto
sudo crb enable /usr/bin/crb

```

Then.

```auto
sudo dnf group list

Last metadata expiration check: 0:13:36 ago on Sat 31 Dec 2022 08:40:10 AM EAT.
Available Environment Groups:
   Server
   Minimal Install
   Workstation
   **KDE Plasma Workspaces**
   Custom Operating System
   Virtualization Host
Installed Environment Groups:
   Server with GUI
Installed Groups:
   Container Management
   Headless Management
Available Groups:
   Fedora Packager
   Xfce
   Legacy UNIX Compatibility
   Console Internet Tools
   Development Tools
   .NET Development
   Graphical Administration Tools
   Network Servers
   RPM Development Tools
   Scientific Support
   Security Tools
   Smart Card Support
   System Tools

```

Then listing the repo group listing.

```auto
sudo dnf group info "KDE Plasma Workspaces"
[sudo] password for jil: 
Last metadata expiration check: 0:20:16 ago on Sat 31 Dec 2022 08:40:10 AM EAT.
Environment Group: KDE Plasma Workspaces
 Description: The KDE Plasma Workspaces, a highly-configurable graphical user interface which includes a panel, desktop, system icons and desktop widgets, and many powerful KDE applications.
 Mandatory Groups:
   Common NetworkManager submodules
   Fonts
   Guest Desktop Agents
   Hardware Support
   Input Methods
   KDE
   Multimedia
   Printing Client
   base-x
 Optional Groups:
   KDE Applications
   KDE Educational applications
   KDE Multimedia support
   Office Suite and Productivity
   firefox

```

The conclusion given was that :  
Red Hat does **not** officially support anything KDE related, but can be installed from EPEL at users own risk.

ref: [KDE plasma on REdhat 8 - Red Hat Customer Portal](https://access.redhat.com/discussions/4861961#comment-1744771)

---

<div class="post-metadata">

**Author:** ![Jil](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/jil/32/1089_2.png) [@Jil](https://forums.rockylinux.org/u/Jil)\
**Post date:** [December 31, 2022, 9:41am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/13 "2022-12-31T09:41:43Z")

</div>

I managed to install KDE Desktop Environment with the steps above. Am now watching its stability.

Thanks, everyone for your contribution.

---

<div class="post-metadata">

**Author:** ![gerry666uk](https://avatars.discourse-cdn.com/v4/letter/g/dbc845/32.png) [@gerry666uk](https://forums.rockylinux.org/u/gerry666uk)\
**Post date:** [December 31, 2022, 4:48pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/14 "2022-12-31T16:48:12Z")

</div>

> [@iwalker](#):
>
> No, RHEL doesn’t provide EPEL to enable out of the box.

OK, I’ll need to check in more detail.  
If you’ve still got access to the RH box, can you try

```auto
dnf repoquery --repoid "extras"

```

---

<div class="post-metadata">

**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\
**Post date:** [December 31, 2022, 5:16pm UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/15 "2022-12-31T17:16:12Z")

</div>

> [@gerry666uk](#):
>
> If you’ve still got access to the RH box, can you try
> 
> ```auto
> dnf repoquery --repoid "extras"
> 
> ```

Can you explain your reasoning behind this command and why you are asking for it to be ran, and what you expect it to show? Extras has nothing to do with EPEL. Also:

```auto
[root@rhel9 ~]# dnf repoquery --repoid "extras"
Updating Subscription Management repositories.
Error: Unknown repo: 'extras'

```

Extras was something from RHEL7, but even then, it still had nothing to do with EPEL repository. It also mentions that in the Red Hat link I posted:

> [@](#):
>
> NOTE: Please do not confuse EPEL with the new [Extras channel/repository in RHEL 7]

---

<div class="post-metadata">

**Author:** ![gerry666uk](https://avatars.discourse-cdn.com/v4/letter/g/dbc845/32.png) [@gerry666uk](https://forums.rockylinux.org/u/gerry666uk)\
**Post date:** [January 2, 2023, 10:09am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/16 "2023-01-02T10:09:15Z")

</div>

Sorry for confusion.

After checking in more detail, I can see that RH do NOT supply the epel repo out-of-the-box, so @jlehtone was right in the first place.

---

<div class="post-metadata">

**Author:** ![brian](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/brian/32/5777_2.png) [@brian](https://forums.rockylinux.org/u/brian)\
**Post date:** [August 25, 2023, 3:29am UTC](https://forums.rockylinux.org/t/error-no-matching-repo-to-modify-crb-oracle-linux-9-rocky-linux-9/8401/17 "2023-08-25T03:29:35Z")

</div>

Closed on August 25, 2023, 3:29am UTC